package com.collection.hashsets;

import java.util.HashSet;

public class SimpleHashSetExample {
	public static void main(String[] args) {
		// create object of HashSet
		HashSet hSet = new HashSet();

		/*
		 * Add an Object to HashSet using boolean add(Object obj) method of Java
		 * HashSet class. This method adds an element to HashSet if it is not
		 * already present in HashSet. It returns true if the element was added
		 * to HashSet, false otherwise.
		 */

		hSet.add(new Integer("1"));
		hSet.add(new Integer("2"));
		hSet.add(new Integer("3"));

		/*
		 * Please note that add method accepts Objects. Java Primitive values
		 * CAN NOT be added directly to HashSet. It must be converted to
		 * corrosponding wrapper class first.
		 */

		System.out.println("HashSet contains.." + hSet);
	}
}
